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software renderer: fix rendering of line polygons. fixes #350

This commit is contained in:
Arisotura 2019-06-11 03:10:32 +02:00
parent 09cfdc6e76
commit 3c70015da7
2 changed files with 9 additions and 6 deletions
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2
src/GPU3D.h
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@ -66,6 +66,8 @@ typedef struct
bool IsShadowMask;
bool IsShadow;
int Type; // 0=polygon 1=horizontal line 2=vertical line 3=diagonal line 4=point
u32 VTop, VBottom; // vertex indices
s32 YTop, YBottom; // Y coords
s32 XTop, XBottom; // associated X coords

13
src/GPU3D_Soft.cpp
View File

@ -1367,7 +1367,7 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y)
// right vertical edges are pushed 1px to the left
// edges are always filled if antialiasing/edgemarking are enabled or if the pixels are translucent
if (wireframe || (RenderDispCnt & (1<<5)))
if (wireframe || (RenderDispCnt & ((1<<4)|(1<<5))))
{
l_filledge = true;
r_filledge = true;
@ -1466,6 +1466,8 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y)
if (xcov == 0x3FF) xcov = 0;
}
if (!l_filledge) x = std::min(xlimit, xend-r_edgelen+1);
else
for (; x < xlimit; x++)
{
u32 pixeladdr = FirstPixelOffset + (y*ScanlineWidth) + x;
@ -1538,8 +1540,6 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y)
AttrBuffer[pixeladdr+BufferSize] = AttrBuffer[pixeladdr];
}
}
else if (!l_filledge)
continue;
DepthBuffer[pixeladdr] = z;
ColorBuffer[pixeladdr] = color;
@ -1561,8 +1561,10 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y)
xlimit = xend-r_edgelen+1;
if (xlimit > xend+1) xlimit = xend+1;
if (xlimit > 256) xlimit = 256;
if (wireframe && !edge) x = xlimit;
else for (; x < xlimit; x++)
else
for (; x < xlimit; x++)
{
u32 pixeladdr = FirstPixelOffset + (y*ScanlineWidth) + x;
u32 dstattr = AttrBuffer[pixeladdr];
@ -1636,6 +1638,7 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y)
if (xcov == 0x3FF) xcov = 0;
}
if (r_filledge)
for (; x < xlimit; x++)
{
u32 pixeladdr = FirstPixelOffset + (y*ScanlineWidth) + x;
@ -1708,8 +1711,6 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y)
AttrBuffer[pixeladdr+BufferSize] = AttrBuffer[pixeladdr];
}
}
else if (!r_filledge)
continue;
DepthBuffer[pixeladdr] = z;
ColorBuffer[pixeladdr] = color;